MIHS Open House: 7-9:30 p.m., Jan. 10, Mercer Island High School Performing Arts Center, 9100 S.E. 42nd St. Upcoming 9th grade parent information night. Overview of school for students not enrolled in MISD schools and their parents, interested in enrolling for fall 2011.

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Widow and Widowers Grief & Loss Support Group: 1-2:30 p.m., Jan. 13, Community Center at Mercer View, 8236 S.E. 24th St. For senior adult men and women who have lost a spouse/partner in death. Free. Reserve a spot: (206) 275-7752.

Holiday Tree Chipping: through Jan. 10. Bring your undecorated holiday tree to the city’s Maintenance Shop at 9601 S.E. 36th St. during daylight hours for the holiday tree chipping service. City staff will repurpose the tree for use in city parks, trails and open spaces. Remove all objects from trees; flocked or artificial trees not accepted. (206) 275-7608.

Christmas Tree Collection: Yard debris customers can set holiday trees out on their regularly scheduled collection day. Trees must be free of flocking and all objects, cut to 4-foot lengths and tied into bundles less than 2 feet by 3 feet wide. Use biodegradable string or twine; do not use nylon, plastic or other synthetic materials. Flocked trees are not recyclable and should be put in the garbage. www.mercergov.org.

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